Fix removing VM from obsolete_vms

The domain-delete event gets string as a 'vm' argument, so use it
directly instead of accessing its 'name' attribute.

Fixes: 25f1be1 "Remove VM from obsolete_vms list if template is deleted"

qui/tray/updates.py

@@ -170,8 +170,8 @@ def domain_removed(self, _submitter, _event, vm, *_args, **_kwargs):
         if vm in self.vms_needing_update:
             self.vms_needing_update.remove(vm)
             self.update_indicator_state()
-        if vm.name in self.obsolete_vms:
-            self.obsolete_vms.remove(vm.name)
+        if vm in self.obsolete_vms:
+            self.obsolete_vms.remove(vm)
             self.update_indicator_state()
 
     def feature_unset(self, vm, event, feature, **_kwargs):